VPN12AD02-FU datasheet(16/22 Pages) CYNTEC

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VPN12AD02-FU Datasheet(PDF) 16 Page - Cyntec Co., Ltd.

Part #	VPN12AD02-FU

Description	Buck-Boost, High Efficiency POL Module

PDF	22 Pages

Scroll/Zoom	100%

Manufacturer	CYNTEC [Cyntec Co., Ltd.]

Direct Link	http://www.cyntec.com/

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16 / 22 page

Rev. P05

VPN12AD02-FU

ILED = VSET - 200mV

8 RFB

If VSET is 200 mV (typ.) the LED current is only determined by the internal offset voltages of the

comparators. To assure the switching activity is stopped and IOUT = 0, VSET has to be < 100 mV.

FIG.34 Analog Dimming

Soft Start Setting:

The soft start ramp is defined by a capacitor placed at the Soft_Start pin. Selection of the

capacitor can be done according to the following approximate formula. Vss_th_eff is the soft

start effectiveness threshold that depends on load condition. Its value is about 0.7 V for the

buck mode and 1.4 V for the boost mode

Vss_th_eff

TSOFT_START = CSOFT_START

26uA

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